/Engine/Source/Runtime/CoreUObject/Public/UObject/UObjectGlobals.h
Callback when packages end loading in LoadPackage or AsyncLoadPackage. All packages loaded recursively due to imports are included in the single call of the explicitly-loaded package.
typedef TMulticastDelegate_OneParam< void, const [FEndLoadPackageContext](API\Runtime\CoreUObject\UObject\FEndLoadPackageContext) & > FOnEndLoadPackage